The very well regarded, and competitively priced, Meepo v1.5 hub-motor e-board is now priced with shipping and import tax (duty and VAT) to the EU, as well as the US. This is great news as not only is it a good spec board for less than £500 (I have tested the v1 and v1.5 looks even better), but their customer support is very well regarded and, importantly, you can purchase individual components or it all as a kit. This makes fixing issues, although from China, much easier than other similar £500 options.
Cost (at time of writing) is £302.52 for the std battery and £446.92 for the more powerful Sanyo model. Cost is the same for either the short 30″ or my preference, the longer 38″.